Press-board.



Nuo. 878,089. PATENTED FEB. 4, 1908. K. E. ROGERS.

PRESS BOARD.

APPLICATION FILED JUNE 17.1907.

UNITED sTATEs PATENT oEEIoE.

KNIGHT E. ROGERS, OF SOUTH MANCHESTER, CONNECTICUT.

PRESS-BOARD.

' tion, reference being had to the accompanying drawings, in which- Figure l represents a perspective view of my improved press board showing in a corner thereof the parts turned back and exposed to show its construction. Fig. 2 is an` enlarged sectional view of my improved press board taken on the line 2-2'of Fig. l. Fig. 3 is a sectional view of my improved press board taken on the line'3-3 of Fig. 1.

Similar letters and figures refer to similar parts throughout the several views.

Press boards are used in knitting and hosiery mills for finishing the goods. The garments are laid between the sheets of press board in the form of what is known as a book until such book is of the right size to be inserted between the plates of the hot steam press. These plates are hollow, and are customarily connected with a suitable source of steam. This book is then placed in the press proper along with the intervening hot steam plates and the pressure and steam are simultaneously applied, thereby ironing, pressing and finishing the knitted fabrics of Athe mills ready for shipment to the trade.

Such press boards are commonly made in heavy sheets of aper card board averaging generally 1/32 ofP an inch in thickness, combining in such paper press boards great toughness, exce tional stiffness and a smooth glaze finish. T ley are composed of an all cotton or linen rag stock containing the highest grade of cotton or linen fiber and in its manufacture the stock is so mani ulated in the paper making machines as to eave the fibers of the raw'stock with as much of their origi? nal strength as is possible.

It has been found by experience that by the use of hot plates in the steam press the ordinary press boards soon become brittle and burn owing to the high degree of heat employed, thereby renderin such sheets of press board practically use ess for further work.

The object of my invention, among other things, is to secure the manufacture of a press board to be used in the steam or hot press which will successfully avoid the `likelihood Specification of Letters Patent. Appli-@aaa flied June 17. 19o?. serai No. 379.319.

Patented Feb. 4, 1908.

of burning, with its resultant brittleness, and lack of durability combining in itself all the well known features of the highest grade of' press board, including a high glaze finish, so that my improved boards may not take the imprints of the knitted goods. I attain this objecty by the use of a thin sheet of metal interposed between two sheets of ordinary press paper andso enmeshing and interlocklng the metal with the paper as to secure their cohesion together in the formation of a press board of no greater thickness thany is ordinarily employed now, but combining in itself extraordinary strength and durability and precluded from any possibility of soon burning or becoming brittle.

Referring to Fig. 1, l represents a thinv sheet of ordinary press paper which forms the top covering of the metal reinforcing filler. 3. 2 is the lower sheet of press paper. 3 is the layer of sheet metal interposed as a ller or relnforcing strip to my press board, having teeth` or projections ,4 appearing above the plain surface as shown in Fig. 2 and adapted, when the press paper is put through the finishing machines to be clenched or enmeshed in the paper sheets 1 and 2.

Fig. 2 shows, 'in cross section, my press board before the same has been put through the finishing machine so as to unite together the component parts of my improved press boards. The form of the teeth projections is immaterial; a preferred form is'shown in Fig. 1.

In Fig. 8 is represented in cross section on an enlarged scale my improved press board afterthe component parts are assembled as is shown in Fig. 2 and the board has passed through the finishing machines. These finishing machines are of the well known type used by paper manufacturers and serve not only to press into ahomogeneous mass the aper coverings and interior sheet metal filler, butalso to impart to the surface of the board the requisite glaze finish. Besides the teeth 4; 4 4, are bent over and clenched into the paper coverings forming anchorages for the adhesion of such paper coverings to the sheet metal proper. It will be observed that where the teeth 4, 4, of the sheetmetal filler are constructed in the form shown in Fig. 1, the teeth grip into the sheet 1, While parts of the sheet 2 are forced into intimate union with the sheet metal through the depressions formed in its surface as shown in Fig. 1. have found ,in practicing my invention that such sheet metal7 preferably sheet steel, canbe obtained in the market having a thickness of from 5/1000 to 10/1000 of an inchI and I prefer to use metal of such a degree of thinness.

I do not-Wish to limit my invention to the use of teeth in the sheet metal iiller inasmuch as the same beneficial result can be obtained by the use of any adhesive Which Would act as a binder between the sheet metal and the tWcY paper sheets forming the covering of my press board, but I prefer to use sheet metal having the projections or teeth as aforesaid inasmuch as a much more permanent union is eiiected by their use between the paper coverings and the interior sheet metal of my board.

Having noW described my invention, what I claim as new and desire to secure by Letters Patent ofthe United States is the follovving, viz:-- v

1. A vpress board consisting of an interior filler of perforated sheet metal having projections therein, an upper paper covering and a lower'paper covering, said paper coverings being each secured to said metallic liller by the bent over projections of the filler being enmeshed in said, paper coveringsI substantially as described.

2. A press board consisting ofan interior filler of perforated sheet metal having projections on one surface and correspondingl depression-s on the other surface, paper Acoverings for such metallic fillerI one of said paper coverings being secured to the metallic `filler by said projections being bent over and enmeshed Within said covering, and the other covering being secured to said filler by being enmeshed in said depressionsfsubstantially as described.

' KNIGHT E.- ROGERS.

Witnesses:

I. O. LoUIs, l ESTHER A. I-IIcKnY. 

